[KQP] Implement extra tests and stress test on column addition with literal default value #20594
Description
Right now YDB support column addition with a default values specified additional into a row-based table.
Need to cover this functionality with a stress tests, including but not limited to:
- try column addition to the table in simple_queue workload, then drop it right after build is started.
- try to cancel and interrupt column addition operation
- cover different types of literal values